subiquity/subiquitycore/log.py

40 lines
1.4 KiB
Python

# Copyright 2015 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import os
def setup_logger(dir):
os.makedirs(dir, exist_ok=True)
nopid_file = os.path.join(dir, "subiquity-debug.log")
LOGFILE = "{}.{}".format(nopid_file, os.getpid())
handler = logging.FileHandler(LOGFILE, mode='w')
# os.symlink cannot replace an existing file or symlink so create
# it and then rename it over.
tmplink = LOGFILE + ".link"
os.symlink(os.path.basename(LOGFILE), tmplink)
os.rename(tmplink, nopid_file)
handler.setLevel(logging.DEBUG)
handler.setFormatter(
logging.Formatter(
"%(asctime)s %(levelname)s %(name)s:%(lineno)d %(message)s"))
logger = logging.getLogger("")
logger.setLevel(logging.DEBUG)
logger.addHandler(handler)
return LOGFILE